package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

//添加到购物车
@Slf4j
@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart) {
        log.info("购物车数据:{}", shoppingCart);
        //设置用户的id 指定当前那个用户的购物车数据
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //查询当前菜品是否在购物车中
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        if (shoppingCart == null) {
            //添加到购物车的是菜品
            queryWrapper.eq(ShoppingCart::getDishId, shoppingCart.getDishId());
        } else {//添加到购物车的是套餐
            queryWrapper.eq(ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
        }
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);
        //判断当前购物车是否存在
        if (cartServiceOne != null) {
            //若果已经存在  就在原来的数量的基础上 +1
            cartServiceOne.setNumber(cartServiceOne.getNumber() + 1);
            shoppingCartService.updateById(cartServiceOne);
        } else {
            //若果不存在  则添加到购物车   数量默认就是1
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }
        return R.success(cartServiceOne);
    }

    ///查看购物车
    @GetMapping("/list")
    public R<List<ShoppingCart>> list() {
        log.info("查看购物车");
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);
        return R.success(list);
    }

    //清空购物车
    @DeleteMapping("/clean")
    public R<String> clean() {
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        ;
        queryWrapper.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        shoppingCartService.remove(queryWrapper);
        return R.success("清空购物车成功");
    }
}
